In the second season, the survivors of the Oceanic Flight 815 discover they are not alone in their battle against 'The Others' and a contested decision to open the hatch reveals a new realm of mystery and intrigue.

In the third season, with Jack (Matthew Fox), Kate (Evangeline Lilly), and Sawyer (Josh Holloway) now prisoners of 'The Others', psychological mind games are the order of the day as the two rival camps battle for supremacy of the island.

The fourth season features both flash-backs and flash-forwards which show the characters before and after their experiences on the island.

Episodes comprise: 'The Begining of the End', 'Confirmed Dead', 'The Economist', 'Eggtown', 'The Constant', 'The Other Woman', 'Ji Yeon', 'Meet Kevin Johnson', 'The Shape of Things to Come', 'Something Nice Back Home', 'Cabin Fever', 'There's No Place Like Home: Part 1', 'There's No Place Like Home: Part 2' and 'There's No Place Like Home: Part 3'.

In the fifth season, the Oceanic 6 are forced to return to the island, where they finally discover the fate of those who were left behind.